Compilare: main.cpp: In function 'bool e_convex(std::vector<punct>&)': main.cpp:40:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(ll i = 2; i < v.size(); i++){ | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:91:33: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | for(ll k = 0; k + 1 < st.size(); k++){ | ~~~~~~^~~~~~~~~~~ main.cpp:97:33: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 97 | for(ll k = 0; k + 1 < dr.size(); k++){ | ~~~~~~^~~~~~~~~~~ main.cpp:108:33: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 108 | for(ll k = 0; k < st.size(); k++) s[ st[k].idx ] = 'I'; | ~~^~~~~~~~~~~ main.cpp:109:33: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 109 | for(ll k = 0; k < dr.size(); k++) s[ dr[k].idx ] = 'V'; | ~~^~~~~~~~~~~